Efi technology needs many different types of sensors to work properly. Electronic fuel injection, why it matters and how to quickly build one. Electronic noise is electronic interference caused by exterior electrical sources such as the ignition system, alternator, fuel pump, etc. Like all ems the 14cux ecu or ecm in rover terminology uses input signals from engine sensors to control the fuel injection system to optimise performance, fuel economy and emissions. We take a look at seven cool selftuning efi systems that will banish your laptop from the garage. Chevrolet performance engine sensors and connectors. The first electronic fuel injection was basically just computercontrolled carburetors attached to a few sensors, like an oxygen sensor and throttle position sensor, all wired to an electronic control unit. The injector s spray fuel into the intake manifold.
An engine control unit ecu, also commonly called an engine control module ecm, is a type of electronic control unit that controls a series of actuators on an internal combustion engine to ensure optimal engine performance. The efi kit is a complete kit including an intake manifiold with an injector mounted on it, aka, port fuel injection system. Since then, fuel injectors have been the primary means of getting gasoline into the engine cylinder so it can combust and you can drive. The adaptive learning feature eliminates the necessity for laptop programming and tuning, except on the most radical engines. Everything you need to know about nascaras new fuel. Understanding fuel mapping technology is much easier if you know the territory. We carry many efi systemsmany selftuning and selflearningfrom the top players in engine performance, including msd ignition, edelbrock, holley, fast, accel, chevrolet performance, quick fuel, and more. Fuel system common rail fuel injection system consists of an ecm, primary fuel filterwater separator, waterin fuel wif sensor, electric fuel primer pump, lowpressure fuel supply pump, secondary fuel filter, fuel delivery pressure sensor, fuel temperature sensor, highpressure fuel pump, fuel volume control solenoid, fuel rail.
Ecu electronic injection system in automotive vehicles. It does this by reading values from a multitude of sensors within the engine bay, interpreting the data using multidimensional performance maps called lookup tables. Dummyproof fuel injection is here and simpler than ever. Fast is the leading developer of electronic fuel injection systems, efi components, intake manifolds, tuning tools for high performance and street applications fuel air spark technology javascript seems to be disabled in your browser. Plugandplay pnp with an o2 sensor dual fuel maps selectable by a manual switch performance switch. The comsyncefi system is unique in that it offers complete engine management in one system. Megasquirt is the premier doityourself efi controller whether you are looking to gain indebt knowledge of efi by building a full featured ecu on your own, or simply want to save money building a proven reliable kit, from megasquirt origins the diy spirit is available in partial and complete kits. Oxygen sensor heater p0031p0032 23 manifold absolute pressure sensor. This is a firmware project of free electronic fuel injection electronic control unit for internal combustion engine. Electronic fuel injection efi and performance parts for harley davidson and vtwin motorcycles. Engine management system and electronic fuel injections. This system consists of the unit injectors, fuel manifolds, electronic pressure regulator, high pressure fuel pump, electronic control unit, wiring harness, and engine sensors.
Electronic fuel injection is such a crucial part of a combustion engine. A throttle body injection tbi system has a single throttle body which contains one or two fuel injectors. Electronic fuel injection efi engine management summary of video this section examines the electronic control unit or ecu the ecu is a microcomputer its constructed from printed. Efielectronic fuel injection systems at summit racing. Pdf electronic fuel injection system electronic fuel. This computer checks for changes in sensor inputs after each millisecond and is designed to change the pulse if anything changes.
Fuel gets pumped up from the tank via a fuel pump out to a fuel injection rail, then into individual injectors which are inserted directly into the intake manifold. Engine speed sensor monitors engine speed, which is one of the factors used to calculate the pulse width there are two main types of control for multiport systems. These sensors are mounted at different parts of the engine. Choose from larger fuel injectors, fuel rails, fuel injection controllers, mass air meters, bigger throttle bodies, complete fuel injection kits and more from leading fuel injection leaders. Efi will increase the life of your engine, reduce maintenance costs, and provide years of troublefree service. This allowed the older nonefi engines to take advantage of the reliability and efficiency that efi systems bring to internal combustion engines.
Diesel engine computer systems electronic unit fuel injection eui systemsrelying on data the oem loaded into the ecm, throttle position, engine and outdoor temperature, and even altitude, the computer system energizes and deenergizes the solenoids that control the injector. Electronic fuel injection efi engine management youtube. Briggs and stratton junior 206 engines have been chosen for formula sae engines for its outstanding performance. Using inputs from sensors such as map, coolant temp, air charge, o2 and tps, the xfi can tailor the fuel and spark curve at any load, rpm, or boost level, providing the ultimate in efficiency and drivability. Then in the mid80s, computerwhiz john meaney created a standalone engine management system that controlled fuel and spark independently from the factory computer. Find out how fuel injection systems work and about the various configurations used in the cars today. They are usually 1 or 2 cylinder engines, and many are 2 stroke small engines. Manages afr on the carburetor like axtec afr systems, idle cut off and power valve on carburetor, electric fuel pump, stepper gas valve with oxygen sensor. Injector nozzle breakage and leakage problems were solved.
For those looking for premier fuel and spark control, hilborn fuel injection is proud to offer the fast xfi 2. Does not include fuel pump, fuel lines, regulator or filters. Electronic control of fuel injection for passenger car gasoline engine. The center of the whole efi system, which controls the fuel map, is the engine control unit ecu. The electronic fuel injection system consists of electronic components and sensors.
We are and happy to report these sensors were made right here in my hometown in the good ole usa. Dubbed digital fuel injection dfi, meaneys device provided almost limitless tuning potential based on a few simple parameters. Electronic fuel injection reference design for small engines. Builtin map sensor 7 bar 103 psi absolute 5 internal memory files.
This complete stand alone plain electronic fuel injection system supports up to 500 horsepower and is by far the simplest and cleanest aftermarket efi system available. Up to 8 injectors output that control up to 32 saturated injectors. The fueltech ft550 is the best ecu for projects that require more features, including. Most modern efi systems are incorporated in an ecu which also controls the ignition system, and may control may other functions such as antilock brakes, traction control. The ems is comprised of sensors for intake air and coolant temperature, turbo. The ecu can adjust the amount of fuel injected into the engine to increase efficiency. Tbi systems were used in the late 1980s and early 1990s. Fuel injection along with electronic timing applies the best fuel mixture and timing for that rpm, load, and temp. Msd was the first company to develop and offer the multiple sparking, capacitive discharge ignition for engines.
Principle of efi efi is an indirect, pressurized injection system with injectors operated by a solenoid. These are the most basic fields, but holley tells us one spot you cant guess on is the fuel injector selection along with fuel pressure values. Take a technological leap forward with a new electronic fuel injection system from summit racing. Understanding the rv8 engine management v8 register. Electronic fuel injection efi small engines up to 4 cylinders 2 slaptesengmgt2 combining the spc56mdiscovery board and evall9779wdspi evaluation board with related graphical user interface gui stswl9979wdspi, you can easily evaluate your small ems for 2 and 3wheeled wheeled road vehicles up to 4 cylinders. Electronic fuel injection reference design for small engines with increasingly tight global pollution standards for even small engines, stmicroelectronics and arrow electronics have produced am electronic control unit ecu reference design for single and twincylinder fuel injected petrol engines. A servojet electronic fuel injection system was designed and manufactured for the cummins vta903 engine. Electronic fuel injection system efi and advanced engine management. Remove this plug and install the temperature sensor in its place. One comes in the form of a marine o2 sensor adapter from the folks at howell efi. If needed, its possible to setup up to 20 injector outputs using a fueltech peak and hold driver. Build the model of lj465q engine by gtpower software and carry on the simulated. When a signal from the ecu is delivered to the fuel injector, it opens and sprays pressurized fuel into the intake.
The system consists of a carb spacer plate with a fuel block and injector, an ecu, and a wide band o2 sensor. This sensor tells the computer how hard and how quickly the driver pushes on the gas pedal. Holley electronic fuel injection system terminator for. The adapter does require the removal of the manifold and some machining but it allows the o2 sensor to be placed into the exhaust flow but protects it from the water exiting the block. Electronic fuel injection, maf and map sensors efi. Efi questions get answered with ken farrell from fitech. We are leading providers of fuel systems and ultra ram sbc efi. As an example, if you need to run 16 staged injectors, 2 o2 sensors, 8 ignitions and dbw throttle plus all of the auxiliary inputs and outputs for boost control, nos control, trans brake, fuel. Located in the exhaust system, these sensors detect the amount of unburned oxygen and fuel coming from the engine. High precision electronic fuel control system efi ecu by. These varying voltage circuits produce an interference in the signals the efi is receiving from its sensors, which can cause the efi to run poorly or otherwise have performance issues due to the improper. The ecu crank and camshaft sensor inputs can be configured for either.
The last carburetorequipped car came off the assembly line in 1990. An electronic control unit receives information in the form of electric signals from the sensors. Other sensors also trim the fuel and timing, but those are the basics. Temp sensor page 2 electronic fuel injection tuning. It has to be kept clean and well calibrated to boost the engines strength and efficiency and to cut down gas consumption. Electronic fuel injection efi comes in several basic varieties. Gasoline engine control block diagram electronic products. Gasoline engine control block diagram modern engine management systems process numerous input parameters delivered by accurate and reliable sensors and control a variety of different actuators by power devices as air intake and fuel injection for every combustion stroke to meet efficiency requirements and stringent emission regulations. By cleanest, we mean it has minimal wiring showing, so. Thundermax utilizes 18mm bosch wideband oxygen sensors and requires compatible oxygen sensors bungs located in your exhaust systems head pipes. Entry level selftuning efi systems were basically designed to replace fourbarrel carburetors on naturally aspirated engines. Heres a basic look at how the sensors in the speeddensity mefi4 fuel injection work. Efi in the experimental aircraft world is becoming the new normal today. As an example, if you need to run 16 staged injectors, 2 o2 sensors, 8 ignitions and dbw throttle plus all of the auxiliary inputs and outputs for boost control, nos control, trans brake, fuel pressure, oil pressure, etc.
Electronic fuel injection efi system use engine sensors, a computer and solenoid operated fuel injector to meter and inject right amount of fuel into the cylinders. Fail safe air fuel gauge an engine life saver as technology has changed over the years with the combustion motor, there has been no bigger change than the use of electronic fuel injection efi. Electronic fuel injection efi is simple, in theory. Downloads ecu electronic injection system in automotive vehicles. Electronic fuel injection efi system explained merits. While some people cling to 100 year old technology such as carbs, mechanical injection and magnetos, the fact is our aircraft efiei can do the job better, with less pilot monitoring and less maintenance. An efi system consists of a fuel pump, fuel injectors, sensors and an engine control unit ecu. List of sensors that are used on efi engines it still runs. Fitech makes the switch to fuel injection easy and affordable. Instead of using a carburetor to determine the mix of fuel and air that flows into the engine, fuel injection uses a system of sensors and electronics to determine how much fuel should be injected. This paper describes advanced electronic fuel injection system for small 4stroke vehicles. The injector driver, o2 sensor heater, and the two relay drivers use a. These modern systems from edelbrock, fast, holley and msd offer greater. Our folks have several options from basic to completely trick.
The comsyncefi system has the ability to prevent burnt pistons by sensing the exhaust gas temps and if a cylinder burns hot it will automatically richen that hole, but if it senses a higher than normal egt for six engine cycles it turns. Wideband o2 sensor corvair electronic fuel injection efi. The main inputs and outputs are clearly shown in this diagram. Principle and working of electronic fuel injection system. Engine sensors how fuel injection systems work howstuffworks. Designs include both the unit pumppipeinjector type system eup or the electronic unit injector eui type system for operation on many fuel types and grades, including heavy fuel oil. By the 80s, digital computer controls were introduced and a new era of. Freeecu is capable of measuring sensors analog, digital, digital frequency and inductive crankshaft pickup signals. The efi engines run more smoothly, with lower emissions and fuel consumption. Edelbrock has been delivering the best combination of dyno proven electronic fuel injection performance for over 40 years. Diesel engine computer systems electronic unit fuel injection eui systemsrelying on data the oem loaded into the ecm, throttle position, engine and outdoor temperature, and even altitude, the computer system energizes and deenergizes the solenoids that control the injectors spill and needlecontrol valves. Selftuning efi systems popular hot rodding hot rod.
A typical efi system for singlecylinder, sparkignited 2 and 3 wheelers, consists primarily of an injector, a fuel pump, an ecu, a suite of sensors and a throttle body. We explain electronic fuel injection and the inner workings of maf and map sensors as well as the purpose they serve in an internal combustion engine in our tech article. Most popular aftermarket exhausts include 18mm oxygen sensor bungs and many factory head pipes as well verify your exhaust system is compatible or see model fitment guide for exhaust details. Order a new holley terminator electronic fuel injection system for your mustang or chevrolet c10 with a carbureted engine from cj pony parts today. Electronic fuel injection electronic fuel injection and. Key considerations related to extended lifetimes and time between services are built into the robust design of these fuel injection systems. Jegs has a large selection of high performance and replacement fuel injection parts to increase horsepower or just get you back on the road. Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector all diesel engines use fuel injection by design.
Aside from the ecu, this is also where you will find various sensors, fuel injector assemblies and any related fuel injection wiring. A unique electronically controlled fuel injection system, named. The system incorporates a vortexshedding airflow sensor, a single point injection assembly. Modern automobiles use electronic fuel injection efi in their fuel delivery system in order to increase the efficiency. This transitional technology worked reasonably well, but was complex and difficult to adjust and maintain as an engine aged and tolerances. Petrol engines can use gasoline direct injection, where the fuel is directly delivered into the combustion chamber, or indirect injection where the fuel is mixed with air before the intake stroke. The fuel injectors can all open at the same time, or each one can open just before the intake valve for its cylinder opens this is called sequential multiport fuel injection. Proflo 4 is not just a replacement for your carburetor, its a complete engineered system that provides the ultimate in performance, drivability and quality.
The electronic control system of an efi is where you will find the ecu. Dec 27, 2018 electronic fuel injection efi engine management summary of video this section examines the electronic control unit or ecu the ecu is a microcomputer its constructed from printed. Electronic fuel injection an introduction from kennedys. Electronic fuel injection system efi architecture, types. The design goal for an efi system is to deliver the correct air fuel ratio for varying load, speed and temperature. Pressure and temperature sensors for electronic fuel. Efi electronic basics efi 101, a good place to start. In fact, the only sensors you need to connect are the coolant temp and the wideband oxygen sensors. Leading manufacturers of electronic fuel injection, racing dashes and engine. Feb 05, 2018 in the mid70s, gm introduced electronic fuel injection efi on the cadillac seville that used a rudimentary computer. Electronic fuel injection efi, the most widely used fuel system today, utilizes a computer to inject fuel into the engine. Up to 20 auxiliary outputs fuel pump, fan, variable camshaft, ac, etc. Fitech fuel injection has been supplying automotive products, specifically fuel injection products, since 2012. Jan 27, 2012 the electronic control system of an efi is where you will find the ecu.
The twowire connector with the yellow and black wires connects to the temperature sensor. Includes tbi unit, ecu, handheld programmer, wiring and all sensors. Functions of a fuel injection ecu system a fuel injection ecu system has several functions. Support articles technical articles electronic fuel injection electronic fuel injection this page is going to be used for a comparison between electronic fuel injection and carburetors. How a fuel injection ecu engine control unit system works. The reason for this is because of injector pulse width. It includes electronic fuel injection, ignition control, 8 wide band o2 sensors and complete data logging. Stmicroelectronics teams with arrow electronics to provide.
Electronic fuel injection efi refers to a technology of introducing pressurized fuel for purposes of combustion. How to convert from a carburetor to electronic fuel injection. The line of msd 6series ignitions are the most popular aftermarket ignitions in the world due to our raceproven performance on the track and our reliability on the street. Fuel injection basics car obd diagnostics, ecu chip. The ft550 is an engine fuel control and monitoring system from fueltech. Some uavs use small rotary wankel engines for the less vibration.
Injectors fuel delivery is provided by four precision 80pound injectors. The ft550lite is an engine fuel control and monitoring system from fueltech. The tps, map, iat and fuel pressure sensors are all incorporated into the ecu saving you wiring and connections. While it may seem difficult to understand, the articles above will help you break down each component that makes up an efi system. How a fuel injection ecu engine control unit system.